[Media Router WebUI] Move replace route responsibility to extension

chrome/test/data/webui/media_router/route_details_tests.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** @fileoverview Suite of tests for route-details. */
 cr.define('route_details', function() {
   function registerTests() {
     suite('RouteDetails', function() {
       /**
        * Route Details created before each test.
@@ skipping 139 matching lines @@
         details.addEventListener('join-route-click', function() { done(); });
         details.route = fakeRouteTwo;
         MockInteractions.tap(details.$['start-casting-to-route-button']);
       });
 
       // Tests for 'replace-route-click' event firing when the
       // 'start-casting-to-route-button' button is clicked when the current
       // route is not joinable.
       test('start casting button click replaces route', function(done) {
         details.addEventListener(
-            'replace-route-click', function() { done(); });
+            'change-route-source-click', function() { done(); });
         details.route = fakeRouteOne;
         details.availableCastModes = 1;
         MockInteractions.tap(details.$['start-casting-to-route-button']);
       });
 
       // Tests the initial expected text.
       test('initial text setting', function() {
         // <paper-button> text is styled as upper case.
         checkSpanText(loadTimeData.getString('stopCastingButtonText')
             .toUpperCase(), 'close-route-button');
@@ skipping 58 matching lines @@
           done();
         });
       });
     });
   }
 
   return {
     registerTests: registerTests,
   };
 });